Question

An airplane has a mass of 2.3×106 kg , and the air flows past the lower surface of the wings at 94 m/s . Part A If the wings have a surface area of 1500 m2 , how fast must the air flow over the upper surface of the wing if the plane is to stay in the air? Express your answer to two significant figures and include the appropriate units.

Answer #1

The answer for above problem is explained below.

An airplane has two wings, each with area 5.00 m2, designed so
that air flows over the top of the wing at 240 m/s and underneath
the wing at 220 m/s. What is the mass of the airplane such that the
lift on the plane will support its weight, in 103 kg?. Note. Assume
the force from the pressure difference across the wings is directed
straight upward. Density of air is 1.29 kg/m3.

A: An airplane has an effective wing surface area of 18
m2 that is generating the lift force. In level flight
the air speed over the top of the wings is 61.5 m/s, while the air
speed beneath the wings is 58.5m/s. What is the weight of the
plane?
B: An antifreeze solution is made by mixing ethylene glycol
(ρ = 1112 kg/m3) with water. Suppose that the
specific gravity of such a solution is 1.1100. Assuming that the
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A small jet airplane has a total wing area of 67.5 m2
and a mass of 8.03 104 kg.
(a) If this jet is in horizontal flight, determine the pressure
difference between the lower and upper surfaces of the wings. in Pa
?
(b) When the speed of air traveling over the wing is 247 m/s,
determine the speed of air under the wing. Use 1.29
kg/m3 as the density of air. in m/s ?
(c) Which answer is correct...

A frequently quoted rule of thumb in aircraft design is that
wings should produce about 1000 N of lift per square meter of wing.
(The fact that a wing has a top and bottom surface does not double
its area.)
a)At takeoff the aircraft travels at 63.0 m/s, so that the air
speed relative to the bottom of the wing is 63.0 m/s. Given the sea
level density of air to be 1.29 kg/m3, how fast (in m/s)
must it...

1. An air-plane has an effective wing surface area of 12.0 m²
that is generating the lift force. In level flight the air speed
over the top of the wings is 58.5 m/s, while the air speed beneath
the wings is 45.5 m/s. What is the weight of the plane?(The density
of air is 1.29 kg/m³) (in N)
2. Water at a pressure of 3.60 atm at street level flows into an
office building at a speed of 0.50 m/s...

A marble column of cross-sectional area 1.3 m2 supports a mass
of 21400 kg . The elastic modulus for marble is 5.0×1010N/m2. By
how much is the column shortened if it is 7.9 m high? Express your
answer to two significant figures and include the appropriate
units.

Two air carts of mass m1 = 0.83 kg and m2 = 0.45 kg are placed
on a frictionless track. Cart 1 is at rest initially, and has a
spring bumper with a force constant of 690 N/m. Cart 2 has a flat
metal surface for a bumper, and moves toward the bumper of the
stationary cart with an initial speed v= 0.66 m/s . Assume that
positive x-axis is directed toward the direction of motion of cart
2.
a)What...

Thermal Storage Solar heating of a house is
much more efficient if there is a way to store the thermal energy
collected during the day to warm the house at night. Suppose one
solar-heated home utilizes a concrete slab of area 12 m2 and 25 cm
thick.
Part A
Part complete
If the density of concrete is 2400 kg/m3, what is the mass of
the slab?
Express your answer to two significant figures and include
appropriate units.
7200 kg
SubmitPrevious...

Solar heating of a house is much more efficient if there is a
way to store the thermal energy collected during the day to warm
the house at night. Suppose one solar-heated home utilizes a
concrete slab of area 14 m2and 26 cm thick.
Part A
If the density of concrete is 2400 kg/m3, what is the mass of
the slab?
The slab is exposed to sunlight and absorbs energy at a rate of
1.5 ×107J/h for 10 h. If...

A very small object with mass 8.30×10−9 kg and
positive charge 7.00×10−9 C is projected directly toward
a very large insulating sheet of positive charge that has uniform
surface charge density 5.90×10−8C/m2. The object is initially 0.460
m from the sheet.
A. What initial speed must the object have in order for its
closest distance of approach to the sheet to be 0.230 m ?
Express your answer to three significant figures and include the
appropriate units.

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